Our Partners

Founded in 1954, the Automatic Transmission Rebuilders Association (ATRA) is an international trade association for the professional automatic transmission repair industry. ATRA is headquartered in Oxnard, California and has over 2,000 members. The ATRA membership consists of more than 2000 repair specialists, students, schools, and suppliers, all supporting the training, research and improvements for transmission repair.

Arnold's Transmission & Gear takes great pride in our reputation in the Denver area as being a business that is accredited by the BBB (Better Business Bureau). Our automotive repair shop makes a good faith effort in resolving any complaints by our customers. We take our BBB accreditation very seriously as we know that to offer auto repair services that benefit and are approved by our Denver area customers, we have to be conscientious of always doing what is right for our customers. 

Arnold's Transmission & Gear relies on Sonnax to help us keep our customers' vehicles running smoothly in and around the greater Denver area. Sonnax has a reputation of being a leader in the designing, manufacturing, and distribution of high-quality parts for the automotive aftermarket. Parts that are critical in helping Arnold's Transmission & Gear give our customers one quality repair after another. Sonnax provides our shop with innovative parts for transmission rebuilds that meet or exceed OE standards. They also give us access to a complete line of components for torque converters needed for both standard, high-performance, and heavy-duty applications.